{"instruction": "You are an expert in relationship extraction. Please extract relationship triples that match the schema definition from the input. Return an empty list for relationships that do not exist. Please respond in the format of a JSON string.", "schema": ["product producer", "content container", "message topic", "instrument agency"], "input": "in his poem , written by the riverside near the battle-ground , mr. emerson alluded to `` yon stem headstone '' ."}
{"product producer": [], "content container": [], "message topic": [], "instrument agency": []}